共查询到20条相似文献,搜索用时 578 毫秒
1.
2.
多投影仪自由立体显示的GPU几何及亮度校正技术 总被引:3,自引:0,他引:3
由多个投影仪拼接显示的自由立体显示系统有很大的显示区域,能够产生更好的立体显示效果.针对可伸缩高分辨率多投影仪自由立体显示的系统特性和屏幕特性,通过分析各种几何校正和亮度校正算法,采用二次几何校正方法解决了自由立体显示中斜投影造成的部分特征点不在屏幕上的问题;提出了基于GPU的亮度自适应多模板校正方法,并通过GPU程序... 相似文献
3.
从硬件选择、几何校正、边缘融合、颜色校正和软件环境等5方面系统地研究了构建大规模立体显示墙系统的关键技术.采用并行绘制技术和基于计算机视觉的自动校正,由Linux集群驱动多台普通投影仪拼接成一个统一的高分辨率、大规模的被动立体显示系统. 相似文献
4.
5.
本文基于结构光测量原理提出了一种双视点多光带非接触式人体测量系统,并提出了用校准架对摄像机和投影实施快速校准的思想,较为详细也给出了人体表面三维点坐标的计算方法。实验结果表明:该系统具有校准速度快、测量精度高和系统成本低的特点。 相似文献
6.
舰船三维目标识别是一个较为复杂的问题,需通过建立完整的、准确的三维舰船目标的二维视图库来描述一艘舰船目标,为此提出了一种基于Vega的舰船多尺度多视点提取技术。首先介绍了舰船目标的三维建模技术;然后研究了怎样由三维舰船模型经由Vega仿真软件自动批量的提取出任意尺度、任意视点的二维舰船视图,并实现自动将不同视点的显示转成二值图像存储。 相似文献
7.
一种光栅普适的LCD多视点立体图像合成方法 总被引:4,自引:0,他引:4
多视点立体图像合成很大程度上取决于多视点立体显示设备的类型。当前,基于光栅的LCD多视点自由立体显示设备最为常见,但目前缺乏针对这类显示器的通用合成方法。因此,提出了一种通用的多视点立体视频图像合成新方法,主要分为子像素判断准则、各视点子像素的子采样、子像素排列合成三部分。该方法从原理上考虑了光栅LCD多视点自由立体显示的各种可能情况,具有普适性和实用价值。通过具体实例验证了所提方法的正确性和可行性。 相似文献
8.
为了实现建筑参观的真实感和沉浸感,该文结合虚拟现实技术的综合应用,使用SketchUp建立建筑三维模型和室内景观三维模型,以目前性能较高的开源图形引擎OSG(OpenSceneGraph)作为支撑,在Windows平台下利用VisualStudio2008设计开发了虚拟建筑场景漫游系统。系统采用高效的算法和优化的渲染技术实现了手动漫游和自动漫游的综合功能,利用多线程技术在多视口中观察图片并配以语音解说,同时增加了导航功能,使参观者在立体环境下体验逼真、直观的建筑漫游感受。虚拟建筑漫游在建筑设计、城乡规划、室内装潢等建筑行业将带来全新的展示和营销方式。 相似文献
9.
10.
11.
Jun Liu Qiong‐Hua Wang Xiao‐Qing Xu Jun Gu 《Journal of the Society for Information Display》2011,19(10):671-674
Abstract— Stereoscopic and autostereoscopic projection‐display systems use projector arrays to present stereoscopic images, and each projector casts one parallax image of a stereoscopic scene. Because of the position shift of the projectors, the parallax images have geometric deformation, which influences the quality of the displayed stereoscopic images. In order to solve this problem, a method based on homography is proposed. The parallax images are pre‐transformed before they are projected, and then the stereoscopic images without geometric distortion can be obtained. An autostereoscopic projection‐display system is developed to present the images with and without calibration. Experimental results show that this method works effectively. 相似文献
12.
Masami Yamasaki Hideyuki Sakai Takafumi Koike Michio Oikawa 《Journal of the Society for Information Display》2010,18(7):494-500
Abstract— A method to increase the viewing resolution of an autostereoscopic display without increasing the density of microlenses is proposed. Multiple projectors are used for the projection images to be focused and overlaid on a common plane in the air behind the microlens array. The multiple overlaid projection images yield multiple light spots inside the region of each elemental lenslet of the microlens array. This feature provides scalable high‐resolution images by increasing the number of projectors. Based on the proposed method, a prototype display that includes 15 projectors was designed and built. 3‐D images were successfully reproduced on the prototype display with full parallax and a wide viewing angle of 70°. 相似文献
13.
Wu‐Li Chen Chao‐Hsu Tsai Chang‐Shuo Wu Chang‐Ying Chen Shu‐Chuan Cheng 《Journal of the Society for Information Display》2010,18(9):647-653
Abstract— This study develops an autostereoscopic display based on a multiple miniature projector array to provide a scalable solution for a high‐resolution 3‐D display with large viewing freedom. To minimize distortion and dispersion, and to maximize the modulation transfer function (MTF) of the projection image to optimize 3‐D image quality, a dedicated projection lens and an accurate six‐axis adjusting platform for the miniature projector were designed and fabricated. Image‐blending technology based on a lookup table was adopted to combine images from 30 miniature projectors into a seamless single image. The result was a 35‐in. autostereoscopic display with 60 views ata 30° viewing angle, 90° FOV, and large range of viewing distance. The proposed system exhibits very smooth motion parallax when viewers move around in front of it. 相似文献
14.
Takahiro Ishinabe Tohru Kawakami Noriyuki Takahashi Tatsuo Uchida 《Journal of the Society for Information Display》2010,18(8):583-588
Abstract— A high‐resolution autostereoscopic 3‐D projection display with a polarization‐control space dividing the iris‐plane liquid‐crystal shutter is proposed. The polarization‐control iris‐plane shutter can control the direction of stereo images without reducing the image quality of the microdis‐play. This autostereoscopic 3‐D projection display is 2‐D/3‐D switchable and has a high resolution and high luminance. In addition, it has no cross‐talk between the left and right viewing zones, a simple structure, and the capability to show multi‐view images. 相似文献
15.
Tianqi Huang Xinran Zhang Hongen Liao 《Journal of the Society for Information Display》2019,27(12):785-794
Floating three‐dimensional (3D) display implements direct interaction between human hands and virtual 3D images, which offers natural and effective augmented reality interaction. In this study, we propose a novel floating autostereoscopic display, combining head tracking lenticular display with an image projection system, to offer the observers with an accurate 3D image floating in midair without any optical elements between observers and the virtual 3D image. Combined with a gesture recognition device, the proposed system can achieve in situ augmented reality interaction with the floating 3D image. A distortion correction method is developed to achieve 3D display with accurate spatial information. Moreover, a coordinate calibration method is designed to improve the accuracy in the in situ interaction. Experiments were performed to prove the feasibility of the proposed system, and the good results show the potential of human‐computer interaction in medicine and life sciences. 相似文献
16.
Jie Zhang Xiao‐Qing Xu Jun Liu Lei Li Qiong‐Hua Wang 《Journal of the Society for Information Display》2013,21(5):203-208
We propose a 3D interaction and autostereoscopic display system that use gesture recognition, which can manipulate virtual objects in the scene directly by hand gestures and can display objects in 3D stereoscopy. The system consists of a gesture recognition and manipulation part as well as an autostereoscopic display as an interactive display part. To manipulate the 3D virtual scene, a gesture recognition algorithm is proposed, which use spatial‐temporal sequences of feature vectors to match predefined gestures. To get smooth 3D visualization, we utilize the programmable graphics pipeline in graphic processing unit to accelerate data processing. We develop a prototype system for 3D virtual exhibition. The prototype system reaches frame rates of 60 fps and operates efficiently with a mean recognition accuracy of 90%. 相似文献
17.
A metric of the 3D image quality of autostereoscopic displays based on optical measurements is proposed. This metric uses each view's luminance contrast, which is defined as the ratio of maximum luminance at each viewing position to total luminance at that position. Conventional metrics of the autostereoscopic display based on crosstalk, which uses “wanted” and “unwanted” lights. However, in case of the multiple‐views‐type autostereoscopic displays, it is difficult to distinguish exactly which lights are wanted lights and which are unwanted lights. This paper assumes that the wanted light has a maximum luminance at the good stereoscopic viewing position, and the unwanted light also has a maximum luminance at the worst pseudo‐stereoscopic viewing position. By using the maximum luminance that is indexed by view number of the autostereoscopic display, the proposed method enables characterizing stereoscopic viewing conditions without using wanted/unwanted light. A 3D image quality metric called “stereo luminance contrast,” the average of both eyes' contrast, is proposed. The effectiveness of the proposed metric is confirmed by the results of optical measurement analyses of different types of autostereoscopic displays, such as the two‐view, scan‐backlight, multi‐view, and integral. 相似文献
18.
Yingying Chen Xinzhu Sang Yuanhang Li Shujun Xing Yanxin Guan Binbin Yan Kuiru Wang 《Journal of the Society for Information Display》2022,30(3):244-255
Large-scale autostereoscopic three-dimensional (3D) displays can give audiences a truly immersive feeling with strong visual impact. However, the traditional autostereoscopic 3D display systems are limited by the display hardware, making it difficult to directly achieve large-scale 3D displays with high resolution. Multiscreen splicing with laser backlights can be used for large-scale and ultrahigh-resolution 3D display, but it normally results in subscreen image asynchronization, view zone error, or obvious edge overlapping. To solve the problems mentioned above, a distributed real-time rendering system for ultrahigh-resolution multiscreen 3D display is proposed. Fifteen 3D LCD display devices are driven through a host, cooperating with laser backlights, a lenticular lens array (LLA), and a directional diffuser to display high resolution, high frame rate, large size, and wide-viewing angle 3D images. The resolution of the whole display system can reach 23,040 × 21,600. The rendering system provides a large-scale and real-time 3D scene image with an ultrahigh-definition resolution at a speed of 40 frames per second and high quality. 相似文献
19.
自由立体显示技术是指不需佩戴立体眼镜等附属设备的3维立体显示技术.它可分为全息立体技术、3维集成成像技术、体3维显示技术和基于视差的自由立体显示技术.其中体3维显示技术和基于水平视差的自由立体技术发展很快.本文首先论述了静态体3维显示技术和扫射体3维显示技术两类不同的体3维显示技术近几年来的研究进展;然后从所使用的光学光栅类型及复用方法上综述了基于视差的自由立体显示技术的现状和特点;最后对比了体3维显示技术和基于水平视差的自由立体技术优缺点. 相似文献
20.
全息透镜板的高精度拼接与装配是基于全息透镜技术的大屏幕LED裸眼3D显示系统搭建中的关键问题。理论计算与实验结果表明,全息透镜板与LED显示模组横向相对位置误差小于1.332mm时,可以满足显示的要求。基于裸眼3D显示系统的投射条纹,提出了基于投射条纹的全息透镜板位置实时调整方法。依据此方法提出了基于极大值测量条纹中心间距的图像处理算法,并结合LabView编写了图像处理程序。实验结果表明,使用该方法测得的亮暗条纹间距的测量精度为0.1mm,反算出全息透镜板与LED屏之间的位置误差小于0.03mm,满足实时调整全息透镜板位置的要求,可以作为全息透镜板在线拼接的检测方法。 相似文献